Mongoose ValidationError（路径是必需的）

Question

我正在尝试在 express 中编写一个 post 方法...对于一些计划 web 应用程序的事件... 创建了事件模型和用户模型，在事件模型中传递了一个 id 字段......在此之后我的代码停止工作......给了我上述错误...... 我附上屏幕截图

任何帮助将不胜感激

我正在尝试在 express 中编写一个 post 方法...对于一些计划 web 应用程序的事件... 创建了事件模型和用户模型，在事件模型中传递了一个 id 字段......在此之后我的代码停止工作......给了我上述错误...... 我附上屏幕截图

任何帮助将不胜感激

我正在尝试在 express 中编写一个 post 方法...对于一些计划 web 应用程序的事件... 创建了事件模型和用户模型，在事件模型中传递了一个 id 字段......在此之后我的代码停止工作......给了我上述错误...... 我附上屏幕截图

任何帮助将不胜感激

//Event Model
const mongoose = require('mongoose');
const eventSchema = new mongoose.Schema({
   title:{
       type:String,
       required:true
   },

   description:{
       type:String,
       required:true
   },
   location:{
       type:String,
       required:true
   },
   date:{
       type:Date,
       required:true,
       default:Date.now
   },
user_id:{
    type:String,
    required:true
     },

   created_at:{
       date:Date,
   }
});
const Event = mongoose.model('Event',eventSchema,'events');
module.exports = Event;



//User Model
const mongoose = require('mongoose');
const bCrypt = require('bcrypt-nodejs');
const userSchema = new mongoose.Schema({
   email:{
       type:String,
       required:true
   },
   password:{
       type:String,
       required:true
   }
});
userSchema.methods.hashPassword = (password) =>{
   return bCrypt.hashSync(password,bCrypt.genSaltSync(10))
}
userSchema.methods.comparePasswords = (password,hash)=>{
   return bCrypt.compareSync(password,hash);
}

const User = mongoose.model('User',userSchema,'users');

module.exports = User;





//post Method:

router.post('/create',[
   check('title').isLength({min:5}).withMessage('Title should be more than 5 letters'),
   check('description').isLength({min:5}).withMessage('description should be more than 5 letters'),
   check('location').isLength({min:5}).withMessage('location should be more than 5 letters'),
   check('date').isLength({min:5}).withMessage('date should be more than 5 letters')
  ],(req,res)=>{
       const errors = validationResult(req);
       if(!errors.isEmpty()){
           req.flash('errors',errors.array())
           res.redirect('/events/create')
       }
       else{
           const newEvent = new Event({
               title:req.body.title,
               description:req.body.description,
               location:req.body.location,
               date:req.body.date,
               user_id:req.user_id,
               created_at:Date.now()
           });
           newEvent.save((err)=>{
               if(!err){
                   console.log('Event was added!');
                   req.flash('info','Event was created successfully!');
                   res.redirect('/events');
               }
               else{
                   console.log(err);
               }
           })
       }
  }); 




App is running on port 3000
(node:23844) DeprecationWarning: current Server Discovery and Monitoring engine is deprecated, and will be removed in a future version. To use the new Server Discover and Monitoring engine, pass option { useUnifiedTopology: true } to the MongoClient constructor.
Error [ValidationError]: Event validation failed: user_id: Path `user_id` is required.
   at ValidationError.inspect (C:\Users\Hassan\Desktop\events\node_modules\mongoose\lib\error\validation.js:61:24)
   at formatValue (internal/util/inspect.js:563:31)
   at inspect (internal/util/inspect.js:221:10)
   at formatWithOptions (internal/util/inspect.js:1693:40)
   at Object.Console.<computed> (internal/console/constructor.js:272:10)
   at Object.log (internal/console/constructor.js:282:61)
   at C:\Users\Hassan\Desktop\events\routes\event-routes.js:69:29
   at C:\Users\Hassan\Desktop\events\node_modules\mongoose\lib\model.js:4598:16
   at C:\Users\Hassan\Desktop\events\node_modules\mongoose\lib\utils.js:256:11
   at C:\Users\Hassan\Desktop\events\node_modules\mongoose\lib\model.js:468:16
   at C:\Users\Hassan\Desktop\events\node_modules\kareem\index.js:246:48
   at next (C:\Users\Hassan\Desktop\events\node_modules\kareem\index.js:167:27)
   at next (C:\Users\Hassan\Desktop\events\node_modules\kareem\index.js:169:9)
   at Kareem.execPost (C:\Users\Hassan\Desktop\events\node_modules\kareem\index.js:217:3)
   at _handleWrapError (C:\Users\Hassan\Desktop\events\node_modules\kareem\index.js:245:21)
   at C:\Users\Hassan\Desktop\events\node_modules\kareem\index.js:272:14 {
 errors: {
   user_id: MongooseError [ValidatorError]: Path `user_id` is required.
       at new ValidatorError (C:\Users\Hassan\Desktop\events\node_modules\mongoose\lib\error\validator.js:29:11)
       at validate (C:\Users\Hassan\Desktop\events\node_modules\mongoose\lib\schematype.js:1055:13)
       at C:\Users\Hassan\Desktop\events\node_modules\mongoose\lib\schematype.js:1109:11
       at Array.forEach (<anonymous>)
       at SchemaString.SchemaType.doValidate (C:\Users\Hassan\Desktop\events\node_modules\mongoose\lib\schematype.js:1064:14)
       at C:\Users\Hassan\Desktop\events\node_modules\mongoose\lib\document.js:2190:9
       at processTicksAndRejections (internal/process/task_queues.js:75:11) {
     message: 'Path `user_id` is required.',
     name: 'ValidatorError',
     properties: [Object],
     kind: 'required',
     path: 'user_id',
     value: undefined,
     reason: undefined,
     [Symbol(mongoose:validatorError)]: true
   }
 },
 _message: 'Event validation failed',
 name: 'ValidationError'
}
connected to DB



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i am trying to write a post method in express...for some events planing web app...
created the event model and the user model, passed an id field in the event model...after this my code stopped working...giving me the above error...
i am attaching screen shots 


any help would be appreciated 

Answer 1

这是 mongoose 错误，主要是由于 mongoose 连接未找到 POST 或 GET API 的 URL。

1. 另一个机会是确保您已使用 bin 在 mongoose 安装位置创建 /data 文件夹，并启动 Mongoose 和 mongod.exe 的 mongoose 服务，并尝试使用 Mongodb compass 来检查连接是否成功。

2. 其他如检查您的 Mongo 连接是否连接正确，如果它已连接或未在 DB 连接 URL 中。